This article reflects information as of 2021. For the latest details, please contact us.

Written by: Tomohiro Koizumi, Representative Director, tentus inc.

I'm reworking, for note, the materials I put together for the lightning-talk event of "IT Undoubu," a Facebook community I take part in.

Believe it or not, this is our 10th year!
It went by in a flash.

It's been climbing steadily.

But what's climbing isn't sales —

it's my weight, which has been climbing more and more over these 10 years.

Especially after I quit smoking in 2016, there was no stopping the weight gain.

After quitting smoking, I took on lots of sports — marathons, road biking, triathlons — but for some reason, along with my stamina, my weight kept increasing, too.

My old friends used to say I looked "like a matchstick,"

but my current friends say I look "like a pro wrestler."

Now, until December 2019, our company was honestly doing great.
I was thinking, let's keep this momentum and push hard in 2020, too — but then...




During the pandemic, projects dropped off sharply, and suddenly I had a ton of free time.



So I decided to use this quiet stretch to get serious about dieting.


First, I started using the calorie-control app Asken.

I learned about the nutrients contained in the food I normally eat, and about the nutrients you fall short on unless you're mindful of them.

Next, I tried an app called fitfes, which holds a competition to see how much you can improve your body in one month.

Because information on the diet, exercise, and lifestyle habits needed for body-making is constantly updated, it was very educational.
Especially since it delivers the exercises you should do as a daily menu, I think it's a really good app for people without an exercise habit.

And then, the main event.

b-monster!
It's a program that fuses HIIT (high-intensity interval training) with boxercise, characterized by extremely high-intensity movements.

I sacrificed all of my work and private life to devote myself to it.

Each program is 45 minutes, but you push yourself so hard that your maximum heart rate sometimes exceeds 200.

There aren't many lessons you go to 25-plus times a month, right?
No exaggeration — it became the period I've trained the hardest in my life.





Pretty amazing, right?

I've graduated from being the guy at the triathlon who most looks like he belongs with a katsu sandwich.
The pandemic left my work slow, which is exactly how I could throw myself into dieting for real.

P.S.

In August I somehow ended up going 60 times in one month. What an idiot...